Unrated severityNVD Advisory· Published Jun 29, 2026· Updated Jul 9, 2026
Strapi users-permissions - JWT Algorithm Confusion via Missing Algorithm Configuration
CVE-2026-57997
Description
Strapi users-permissions plugin fails to restrict JWT algorithms when plugin::users-permissions.jwt.algorithm is not explicitly configured, allowing acceptance of HS384 and HS512 tokens alongside HS256. Attackers possessing the jwtSecret can mint tokens with non-standard HMAC variants to bypass algorithm restrictions and weaken authentication controls.
Affected products
2Patches
Vulnerability mechanics
References
3- www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missing-algorithm-configurationmitrethird-party-advisory
- github.com/strapi/strapi/issues/26587mitreissue-tracking
- github.com/strapi/strapi/pull/26752mitreissue-tracking
News mentions
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